just keep walking until the poison wears off, rest only if walking is too dangerous.

Actually, my usual procedure when poisoned is to walk if safe, and quaff CLW if my hps are too low for me to feel comfortable walking around (if I don't have any potions left, then I recall immediately, and pray that either the recall or the poison expiration kicks in before I die). The only time I will ever press the "rest one turn" button for any purpose is when I want an enemy to walk one step forward so that I can shoot it, and I don't have anything better to do with the turn.